For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

General Description

(RTC) in a 6-pin TDFN package contains a real-time

dom access memory (SRAM). The real-time clock/cal-

endar provides seconds, minutes, hours, day, date,

month, and year information. The end of the month date

is automatically adjusted for months with fewer than 31

days, including corrections for leap year up to the year

2100. The clock operates in either the 24hr or 12hr for-

mat with an AM/PM indicator.

Applications

Portable Instruments

Point-of-Sale Equipment

Intelligent Instruments

Battery-Powered Products

Features

o Real-Time Clock Counts Seconds, Minutes,

Hours, Date, Month, Day, and Year

o Leap Year Compensation Valid up to Year 2100

2.0V to 5.5V

o Uses Standard 32.768kHz, 12.5pF Load, Watch

Crystal

o Ultra-Low 225nA (typ) Timekeeping Current

o Single-Byte or Multiple-Byte (Burst Mode) Data

Transfer for Read or Write of Clock Registers or

SRAM

o 6-Pin 3mm x 3mm x 0.8mm TDFN Surface-Mount

Package

o No External Crystal Bias Resistors or Capacitors

Required

________________________________________________________________ Maxim Integrated Products

1

µC

RPU

RPU

0.01

µF

CRYSTAL

X1

SCL

SDA

5

2

3

4

1

6

X2

GND

MAX6900

19-1942; Rev 3; 6/03

Typical Operating Circuit

X1

GND

X2

1

6

SDA

5

SCL

MAX6900

TDFN

TOP VIEW

2

34

Pin Configuration

Ordering Information

PART

TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX6900ETT-T

-40

°C to +85°C

6 TDFN

AEU

Related Real-Time Clock Products

PART

SERIAL BUS

SRAM

ALARM

FUNCTION

OUTPUT

FREQUENCY

PIN-PACKAGE

MAX6900

I

——

6 TDFN

MAX6901

3-wire

Polled

32kHz

8 TDFN

MAX6902

SPI™ compatible

Polled

—

8 TDFN

of Maxim Integrated Products, Inc., or one of its sublicensed

as defined by Philips.

SPI is a trademark of Motorola, Inc.